Composition of matter for making fire-brick.



EARL V. WAGNER,0F SCRANTON, PENNSYLVANIA, ASSIGNOR TO THE WAGNER FIREBRICK COMPANY, OF HELENA, MONTANA.

COMPOSITION OF MATTER FOR MAKING FIRE-BRICK.

No Drawing.

To all whom it may concern:

Be it known that I, EARL V. WAGNER, a citizen of the United States,residing at Scranton, in the county of Lackawanna and State ofPennsylvania, have invented a new and useful Composition of Matter forMale ing Fire-Brick, of which the following is a specification.

My composition consists of the following named ingredients combined. insubstantially the proportions here stated:

Coal ash 100 lbs. Magnesia 3 lbs. Water 2 to 29,; gals.

It is not intended to confine the patent here applied for to the use ofthe ingredients specified in the proportions stated, as the proportionsmay in some cases be advantageously varied, producing substantialidentity of result. To illustrate: If the fusion point of the coal ashis found to be less than 2600 degrees Fahrenheit, or if a high fusionpoint for the fire brick is desired, the percentage of magnesia used isto be increased. Thus, taking 100 pounds of coal ash as a basis whosefusion point is 2600 degrees Fahrenheit, to this is added 3 pounds ofmagnesia which will raise the fusion point of the mixture to 3250(32253275) degrees Fahrenheit. If on account of impurities and foreignsubstances in the coal ash its fusion point is found to be below 2600degrees Fahrenheit, the percentage of magnesia: must be correspondinglyincreased to produce the above named result, the percentages being basedupon the original fusion point of the coal ash and upon the fusion pointof the fire brick which it is desired to obtain. ,The proportionsSpecification of Letters Patent.

Patented Sept. 12, was.

Application filed January 8, 1916. Serial No. 70,983.

above stated are therefore approximately pure coal ash having a fusionpoint of approximately 2600 degrees Fahrenheit.

Grind and mingle the coal ash with the magnesia, then add the water andmix until thoroughly plastic. Press the plastic mass through a moldingmachine of approved type. Cut the brick to the size desired by the useof a cutting machine of approved type. The freshly cut bri'cks'are thenrepressed in a repressing machine of approved type in which theyaresubjected to heavy pressure sufiicient to fill out all angles and Idecrease the laminations and to strengthen the bond. Then place thebrick in a closed drying oven and dry for six to eight hours at atemperature of 500-600 degrees Fahrenheit. Remove the bricks while hotto a closed burning kiln whose temperature is gradually raised to2200-2400 degrees Fahrenheit at which temperature the bricks are firedfor seven to eight days when they are allowed to 'cool gradually,resulting in the finished product.

I am not aware that the ingredients aforesaid, in the proportionsstated, -or in any' tially as described.

EARL v. WAGNER.

Witnesses:

HOMER C. HU'rcmNs, DAVID J. JoNns.

copies at this patent may be obtained for five cents each, by addressingthe "Gommltsioner or Eatenta. "Washington, D. 0.

